Drill puller



1933- T. STAMPFLI ET AL DRILL FULLER 2 Sheets-Sheet 1 Filed Feb. 11, 1933 B M Q INVENTORS LJYSiampf 2 AS C72iriescu BY WQ um ATTORNEY 1933- L. T. STAMPFLI El AL 1,937,171

DRILL FULLER Filed Feb. 11, 1953 2 Sheets-Sheet 2 INVENTORS L. TStanq f i *4, AS. Chiritescu BY Q 8 ATTORNEY ing a plurality of handles 6 projecting radially- Patented Nov. 28, 1933..

I DRILL PULLER V V Leopold T. Stampfii and Steve chiritescu,

Crescent Mills, Calif,,

assignors of one-third to Harry 0.,Dunlap, Stockton, Calif.-.

jApplication February 11, was; Serial Niij- 656,318

. 3 Claims. v(o1. 2'54 30) v I This invention relates to tools for starting jammed drills so that they may be extracted, being especially 'designedfor usein connection with drill rods such as are used in earth or rock drilling operations and such as are attached to and rotated by a portable pneumatic or similar tool. The principal object of our invention is to provide an implement for the purpose so constructed that the jammed drill may be rotated while being raised or may be raised without rotation as the conditions may determine to be best. The implement is also constructed so that the raising of the drill by the action of the implement may be accompanied by a rotation of the drill by'its own driving tool, without interfering with or altering the raising action of the extracting implement.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly eifective for the purpose for which it is designed. I

These objects we accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

. Fig. 2 is a fragmentary elevation of the upper portion of the implement taken in a plane at right angles to that on which Fig. 1 is taken. Fig. 3 is a top plan view of the implement. Referring'now more particularly to the characters of reference on the drawings, the numeral 1 denotes a portable base which is in the form of a jack body, open on the bottom, and in which is mounted a tubular jack screw 2. This screw has a bore 3 open from end toend and of a size sumcient to freely receive any drill rod 4 to be pulled.

Secured to the screw adjacent'its upper end and above the body is a rigid disc or plate 5', havtherefrom whereby the screw may be turned and thus raised or lowered relative to the body. Turnably mounted on the screw immediately disc '7, held against upward movement by a flange 8 on the screw. The discs havev matching holes 9 to receive removable pins 10 so that said discs may be locked for rotation together, or they may v be freed so as to turn relative to each other as above and supported on the disc 5 is another the conditions of operation may require. These pins have collars intermediate their ends to limit their downward movement, and have tapered ends as shown to facilitatetheir entryinto the holes.

Projecting upwardly from and rigid with the disc 7 on opposite sides of the screw are laterally resilient standards 11 on the upper ends of which are opposed cooperating jaw elements 12. These elements together are adapted for clamping engagement with the drill rod and are axially alined with the screw 2. The'jaws are provided with opposed sets of ears 13 through which clamping. screws 14 project so thatthe jaws may be tightened about the drill with the necessary holding pressure. The screws are attached to swivelly connected handles 15 which may be turned at right angles to the screws so as to give leverage for tilting the same orthey may be placed horizontally in axial alinement with thescrews to provide for hand rotation of the clamping unit when desired.

In operation the implement is slipped over the jammed drill from its outer end, the driving tool being temporarily removed. The. body 1 then rests directly on the ground about the drill or it may be supported on blocks as indicated in Fig. 1. The jaws 12 are clamped about the drill by ,manipulating the screws 14 and the pulling operation may then be proceeded with. If a combined raising and turning of the drill is desired the discs 5 and 7 are locked together by the pins '10 to cause the drill clamps to turn with the screw 2, which is operated by the handles 6 and which of'course rotates as it is raised from the body. If no rotation of the drill is desired or feasible the pins 10 areremoved, the jaw unit being held against rotation by the handles 15 while the screw 2 is manipulated. If it is desired to impart intermittent rotation to the drill by its own power, so as to possibly jarthe same loose, the pins 10 are left out. This permits the jaw unit to turn at any relative speed with the turning and raising operation of the jack screw and without interfering with such operation. With our improved construction therefore we may impart a number of different movements to the drill as. conditions may render advisable without in any way afiecting a steady or intermittent raising movement of the drill.

It is to be understood that antifriction bearings of suitable character are preferably provided between the contacting parts wherever the load or pressure renders the use of the same advisable.

From the foregoing description it will be readno ily seen that we have produced such a device as substantially fulfills the'objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described our invention what we claim as new and useful and desire to secure by Letters Patent is:

1. A drill extractor comprising a base, a tubular jack screw to receive a drill therethrough mount ed in the base, means for turning the screw, a drill clamp separate from and axially alined with the screw, means for connecting saidclamp to the screw for rotation therewith or for relative rotation independently thereof, selectively and handle means on the clamp for turning the same independently of the screw.

2. A drill extractor comprising a base, a tubular jack screw to receive a drill therethrough mounted in the base, means for turning the screw, a drill clamp separate from and axially alined with the screw, supporting means for the clamp turnably mounted in connection with the jack screw at its outer end for longitudinal movement as a unit, means for releasably holding the screw and supporting means against relative rotation and a common means for tightening the clamp and for turning the same independent of the screw.

3, A drill extractor comprising a base, a tubular jack screw to receive a drill therethrough mounted in the base, means for turning the screw, a drill clamp beyond and axially alined with the screw, said clamp comprising opposed cooperating elements, a continuous ring-like plate secured on the screw adjacent its outer end for rotation therewith, another plate of similar form turnably mounted on the screw in superimposed and concentric -relation to and bearing on said first named plate, means to releasably hold the plates against relative rotation, and standards rigid with the last named plate and on the outer ends of which the clamp elements are mounted.

- LEOPOLD T. STAMPFLI.

STEVE CHIRITESCU. 

